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Why do certain commands not show up when you type “help” in cmd.exe?

If I enter HELP in the Windows 7 command prompt, it will give me a substantial list of command prompts. But, this list doesn't appear to cover every prompt that can be entered in the Windows 7 command prompt. For example, it does not have IPCONFIG, or NSLOOKUP, or many others.

What is the reason for this?

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marked as duplicate by H3br3wHamm3r81, Andrew Lambert, Karan, ChrisF, techie007 Feb 2 '13 at 17:09

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
I am trying to VTC as dupe of superuser.com/questions/62220/… or superuser.com/questions/485009/…, but it's not allowing me to do so (even though first one has an upvoted and accepted answer). I do not like this stupid change. Off to rant in meta. –  Karan Feb 2 '13 at 1:08
    
I agree it was a dupe, now. Thanks Karan. –  H3br3wHamm3r81 Feb 2 '13 at 1:16
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1 Answer

up vote 1 down vote accepted

HELP only shows built-in commands. All executables in your %PATH% can be called, too. To see your path, try echo %PATH%.

If you want to know where an executable that you can execute (such as NSLOOKUP) is, check out Is there an equivalent of 'which' on windows?.

To see all executables in your %PATH%, search all the directories in it for files having one of your PATHEXT's.

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Ah, you mean "internal," right? I see now. –  H3br3wHamm3r81 Feb 2 '13 at 1:06
    
yeah i meant that. accept the answer if it satisfies you. –  Janus Troelsen Feb 2 '13 at 1:14
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